Accession Number : ADA192115

Title :   Thermographic Detection of Buried Debonds,

Corporate Author : AEROSPACE CORP EL SEGUNDO CA MATERIALS SCIENCES LAB

Personal Author(s) : Quinn, Mary T ; Hribar, John R ; Ruiz, Raymond L ; Hawkins, Gary F

PDF Url : ADA192115

Report Date : 01 Mar 1988

Pagination or Media Count : 21

Abstract : This study was done to improve the reliability of solid rocket motors by testing infrared video imaging for detecting adhesive bonding flaws. The flaws, buried beneath 0.3 in. of steel and 0.2 in. of rubber in these motors, have been difficult to detect by conventional pulse-echo ultrasonic techniques. Ultrasonic inspection has been ineffective because of the large acoustical impedance mismatched at the steel-rubber interface. To detect buried flaws in spite of the impedance mismatch, infrared video imaging was investigated.

Descriptors :   *ADHESIVE BONDING, *DETECTION, *INFRARED IMAGES, *THERMOGRAPHY, ACOUSTIC IMPEDANCE, BURIED OBJECTS, ECHOES, PULSES, RELIABILITY, RUBBER, SOLID PROPELLANT ROCKET ENGINES, ULTRASONIC TESTS, VIDEO SIGNALS

Subject Categories : Infrared Detection and Detectors
      Target Direction, Range and Position Finding

Distribution Statement : APPROVED FOR PUBLIC RELEASE